Driving mechanism for sheet-conveyers.



T. G. DEXTER & W. M. MCCAIN. DRIVING MECHANISM FORSHEET GONV'EYBRS. APPLICATION FILED MAY 7, 1909.

Patented Feb. 22, 1910.

3 SHEETS-SHEET 1.

' 6 Mar/hi4 glmvemto'cf Q/V bvwam y T. G." DEXTER & W. M. MGGAIN.

DRIVING MECHANISM FOR SHEET GONVEYERS. APPLIQATION nun) MAY'7.1909.

950,374. Patented Feb. 22, 1910.

3 SHBETS-SHEET 2.

T. C. DEXTER & W. M. MCCAIN. DRIVING MECHANISM FOR SHEET UONVEYERS. APPLICATION rum) my '1, 1900.

Patented Feb. 22, 1910.

SSHEETS-SHEET 34 vanes striations arena mace.

TALBOT -C. DEXTER AND WILLIAM 1V1. MCCAIN, F PEARL RIVER, NEW YORK; SAID MQCAIN ASSIGNOR 1'0 SAID DEXTER DRIVING MECHANISM FOR SHEET-CONVEYERS.

sedate.

Lib all iii/tom it may concern.

Be it known that we, TALBOT C. Dcx'rnn and VVILLIAM M. MUCAIN, both citizens of the United States, residing at Pearl River, the county of Rockland and State of New York, have invented certain new and useful Improvements in Driving Mechanism for Sheet-Conveyers, of which the following is a specification.

In feeding sheets to a printing press from .an automatic paper feeding machine, it is necessary to move the sheets very rapidly through the greater part of their travel toward the front gages of the press and then slow them down as they approach the gages so. as .to prevent the rebound ofthe sheets from the gages or the injury of the leading edge of the sheet.

The present invention relates to improvement'sr'ln driving mechanism for the sheet conveyors or forwarding devices which take the successive sheets from an automatic paper feeding machine and deliver them to the-front gages of a press, at which point the side registering mechanism upon the conveyer frame operates to place the successive sheets in registered position just prior to the action of the press grippers in taking the sheets from the con'veyer frame.

In our improved driving mechanism, we provide a simple and effective eccentric crank gear between the driving shaft and the sheet forwarding devices so that the successive sheets will be taken from the pile at '35 a relatively low speed. and moved through the greater part of the distance from the feeding machine to the front gages of the press at a relatively high speed, and finally delivered atythe gages of the press at a relatively lowspeed. By reason of the employment of the eccentric crank driving gear, the variable motion ofthe sheet forwarding devices, or.conveyers is constantly and gradually changingfromlow to high speed and from hightolow speed so that the mechanismand the sheets carried thereby are not subjected to. any shocks or sudden changes of motion. In order that our invention may be fully understood we will first describe the same with reference to the accompanying drawings and afterward point outthe novelty moreparticularlyin the annexed clanns.

.Fig. Fig. 5

- Specification of Letters Patent.

Application'filed May 7, 1909. Serial No. 494,582.

In said drawings: Figure l is a detail side elevation'of the front portion of 'an automatic paper feeding machine having our improved slow-down driving mechanism applied thereto. Fig. 2 is a detail rear e1evation of the same. Fig. 3 is a side elevation of the main parts of the mechanism shown in Fig. 1 showing the parts in a different position. Fig. 4- 'is a vertical transverse sectional view taken on the line 44 of is a detail vertical longitudinal sectional View taken on the line 5-5 of Fig. 4. Figs. 6 and 7 are detail views of the sliding block of the crank pin.

In illustrating our improved slow-down driving mechanism for sheet eonveyers We have shown only the forward part of an automatic pa er feeding machine and the receiving en of the sheet conveyor to which the successive sheets which are separated from the pile or bank are passed from the feeding machine It will of course be understood that-our improved driving mechanism may be applied to any form of automatic paper feeding machine to operate a sheet conveyer or sheet forwarding device of any approved construction, the illustration of a part of a particular paper feeding machine and of the ordinary tape conveyer being intended as illustrations of said mechanisms only in a broad sense.

10 represents a part of the upright frame of any suitable paper feeding machine which is ordinarily provided with means for separating sheets from the bank or pile and for moving them forwardly to suitable delivery mechanism which takes thesuccessive sheets and passes them to the conveying mechanism which leads the sheets to the front gages of a press or other machine which is designed to operate upon the sheets.

15 is a shaft extending from side to side and journaled at its opposite ends in the frame of the automatic paper feeding machine at the delivery end thereof. The shaft 15 carries a plurality of constantly running under feed rollers 16' over which the successive sheets are passed from the pile or bank of the feeding machine to the sheet conveyor.

17 is a rock shaft suitably journaled in the feeding machine frame and carrying rock arms 18 supporting in their free ends 1 arm 22 formed with a extending radially of the shaft 20. For the purpose of 'stifienmg and balancing the crank arm. and disk are a mach ne by a; Short cylindrical I With'l-fla ring'3l-fhas n eccentric opening 33 through which theidriving shaft 20 extends and-is carries a crank at 4.2 to freely pass the flange 32 of ring 31 atone point in the stroke,-

j 15. This. drum 60 supports all the drop rollers 19.- Suitable cam mechanthe under feed rollers 16. The constantly driven under feed rollers 16 and drop rollers 19 constitute the ordinary form of drop roller delivery mechanism.

20 is a shaft suitably 'ournaled in the feeding machine frame an constituting in the particular Dexter automatic paper feeding machine. This shaft 20 has secured to its outer end by means of a; key or set screw 21 a heavy crank guideway or slot 23 arm .22, we prefer to form it integral-with a disk24 as shown, so that in effect the crank driving wheel having a radial guide-way or slot.

Rigidly. secured to the side frame of the by bolts 30 or other suitable securing anec'centric bearing ring 31 formed rm lar flange 32. 'This bearing means,

properly-centeredupon the machine frame stud 34 engaging the bearing'ringi'and frame. "40,-i's the ringigear freely journaled upon the bearing ring3l and confined thereon against thefram'e bythe annular flange .32 of thebearing ring 31. This ring gear 40 pin 4C1 upon which is journaled a-bearing block 4L2 which engages and slides in the radial slot 23 of the driving crank arm 22, said block 4:2being cut. out bearing and cut out at 42" to pass around the driving shaft 20 at another point in-the stroke. out portion42 of block 42 passes under the flange 32 when the block is in the position shown in'Figs. 3 and 4 of the drawin s, the cut-out portion 42 passes around t e driving shaft 20-when the parts are in the position shown in Fig. l'of the drawings. The gear ring 40 meshes with and drives an intermediate gear 50 journaled'upon a stud 51- up0n the machine frame, said intermediategear 50 driving a similar naled upon stud 53 upon the' machine frame. This gear -52imeshes with and drivesa gear 55 keyed to. the projecting end of the con-v stan-tly driven under feed. shaft' 15 of the drop roller delivery mechanism. By this means, said shaft 15 and feed rollers 16.are' driven.

60 is the drum or large tape roller extending transversely of the machine parallel with the-shaft- 15 and having keyed to one is drivenby an mtermediategear 62 meshing with and driven by the illustration the cam shaft of a The cutgear. 52 jourgear 55 on. shaft the receiving end of a series of convey-er tapes, one. Of

which is shown at 65.

is one of a series of the ordinary. belt tightening rollers or pulleys engagmgthe' tapes 65 for holding them taut.

It will be understood without further illustration that the series of 'conveyer belts or tapes 65 pass from the delivery end of the feeding machine toward the front gages of a printing press or other machine to which the conveyer is applied, the oflice} pf the conveyer tapes being to supply the suc cessivesheets as they are fed from the feed ing machine, in proper time for theopera- "tion of the press or other machine.

It will be observed from the above de-- scription that our improved slow-down de livery mechanism operates not only the constantly driven under rollers ofthe drop roller-deliveiw mechanism, but also the driving drum or roller of the belt conveyer mechanism. This mechanism is so timed with relation to the operation of the automatic paper feeding mac 'ne and the printing. press or other machine to which sheets are. delivered, that the drop rollers l9'will engage the leading edge of the sheet-above 'the under rollers 16 when the variable speed drivingmechamsm isoperating at its lowestspeed. This'position of the -parts is shown in Fi 1 and 2 ofthe drawings. The meet is taken by the dro roller delivery mechanism running at said slow speed and delivered to the tapes of the sheet conveyer, the speed of the drop roller delivery mechan ism and the tapes gradually increasin as the sheet leaves the pile or bank'of the eeding machine until it is moving atits greatest rate of speed, at which time the sheet is ap proximately half way to' the front gage'so highest rate of speed is shown in F1 3 d o the and 4 of the drawings. The spee v conveyer then gradually-reduces to its lowest speed at which point the sheets are delivered tot-he front gages of the press and the ordinary sheet registering gages are thrown intq action and the sheets taken by the grippers of the press. It will be observed that the variable speed of our improved driving mechanism isdue 4.0 with relation to, the drivin shaft'20 which 1 carries the driving or arm 22,

the crank block 42 sliding inwardly and outwardly in the guide way or slot the driving crank arm andtransforming the regular speed of 'the' driving crank arm into a variable speed.

What we claim. is: y ;1. The combinationpf a shaft..carryingla slotted crank arm, a rotary power transmit: ting ring gear mounted eccentrieal1y.with relation tosaid shaft and carrying a era; pin which is; -engaged; by said slotted. crank f the press. -The position of the parts at the .ito the eccentric position of' the}crank gear arm, suitable sheet forwarding means, and gearing between said sheet forwarding means and said power transmitting member. 2;;1he combination of a shaft carrying a driving c 'ank arin which is slotted radially In a paper feeding machine, the, combination of suitable delivery mechanism including the undervfeed roll and the c06pcrating drop rollers, a driving shaft, :1 driving crank arm mounted upon said shaft, a power transmitting gear mounted eccentrically with relation to said shaft, and geared to said under feed roll, a crank pin carried by said gear and engaged by said driving crank arm, and sheet conveying tapes 'or belts driven by said under feed roll.

4. The combination of a driving shaft,

carrying a driving member, a fixed bearing member mounted eccentrically with relation to said driv ng shaztt, a rotary power transmitting member journaled upon said beariug member and carrying a crank pin, means of engagement between said driving member and said crank pin, and suitable,

sheet forwarding means driven by said power transmitting mem er.

'lhe combinationloi" a shaft carr 'ing a driving crank arm which is slotted radially with relation to said shaft, :1 ring gear journaled ecccntrically with relation to said shaft, a crank pin mounted upon said ring gear, a bearin block journaled upon said crank pin and engaging the slot of said driving crank arm and movable inwardly and voutwardly therein, suitable sheet I'orwarding'means, and gearingbetween said sheet forwarding means and said ring gear.

6. The combination of a. shaft carrying'a driving crank arm which is slotted radially with-relation to said shaft, a bearingmember mounted eccentrically with relat on to said shaft, and formed withan annular flange, a ring gear journaled upon said hearing member and'confinedby said annular flange, a crank pin mounted upon said ring geaig'a bearing block journaled upon said crank pin .and engaging the slot of said driving crank arm, suitable sheet forward ing means, and gearing between said sheet forwarding means and said ring gear.

TALBOT C. DEXTER. WILLIAM M. MCCAIN.

Witnesses A. U. HAMMOND,

IRVEN H. DEXTER. 

